Because neither of us knew much about Mendelssohn (grandfather of the composer, Felix Mendelssohn), Ken googled him. Among other facts about his life, the Wikipedia article about him had an arresting paragraph about an affliction he was known to suffer from.
In March 1771 Mendelssohn's health deteriorated so badly that Marcus Elieser Bloch, his doctor, decided his patient had to give up philosophy, at least temporarily. After a short and restless sleep one evening, Mendelssohn found himself incapable of moving and had the feeling of something lashing his neck with fiery rods, his heart was palpitating and he was in an extreme anxiety, yet fully conscious. This spell was then broken suddenly by some external stimulation. Attacks of this kind recurred. The cause of his disease was ascribed to the mental stress due to his theological controversy with Lavater. However, this sort of attack, in milder form, had presumably occurred many years earlier.Could this be another addition to the HKPP Hall of Fame (we've previously written about Elizabeth Barrett Browning and the possibility that she had this disorder)? We're on the trail.